Efficient respiratory surfaces require a large surface area, moisture, thin walls, a good blood supply, and an efficient ventilation mechanism.
Efficient respiratory surfaces require a large surface area, moisture, thin walls, a good blood supply, and an efficient ventilation mechanism.
| Front | List three features, other than large surface area, that are required by efficient respiratory surfaces in animals |
|---|---|
| Back | Any three of: moist/ thin/ good blood supply/efficient ventilation mechanism |
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